/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraNodeInput.h
[USTRUCT](Programming/UnrealArchitecture/Reference/Structs)() struct FNiagaraInputExposureOptions
uint32:  1
bCanAutoBind
If this input can auto-bind to system parameters and emitter attributes.
uint32:  1
bExposed
If true then this is exposed as an input to it's caller - turning this off makes sense when the input is defined in a function script and should not be visible to the caller.
uint32:  1
bHidden
If true then this input will be shown in the advanced pin section of the caller node.
uint32:  1
bRequired
If true then this input is required to be set by the caller.